From 2015 through 2018 I noted the nationalities of the institutional affiliations for the authors of every
paper I posted with flag icons. Although I have discontinued this feature as of January 2019, it created an
intriguing and encouraging record of the world-spanning interest in astrochemistry.

Here is a map showing most of the 75 countries that have contributed to astrochemistry research in the four
year period (view it in its own window to expand to its full size):

Here is a list of the countries and the number of times its flag has flown on the publications pages: